Battery control circuit, battery, and related electronic device

Abstract

The battery control circuit includes a first inductor, a first switch tube, a second switch tube, a first diode, and a second diode. A first terminal of the first switch tube and a cathode of the first diode are both coupled to the positive electrode of the battery pack, and a second terminal of the first switch tube is coupled to a terminal of the first inductor and a cathode of the second diode. An anode of the first diode is coupled to another terminal of the first inductor and a first terminal of the second switch tube, and a second terminal of the second switch tube and an anode of the second diode are both coupled to the negative electrode of the battery pack. The first switch tube and the second switch tube are simultaneously turned on or turned off.

1 . A battery control circuit, comprising
 a first inductor;   a first switch tube;   a second switch tube;   a first diode; and   a second diode, wherein the battery control circuit is connected in parallel between a positive electrode and a negative electrode of a battery pack, wherein a first terminal of the first switch tube and a cathode of the first diode are both coupled to the positive electrode of the battery pack, and wherein a second terminal of the first switch tube is coupled to a terminal of the first inductor and a cathode of the second diode,   wherein an anode of the first diode is coupled to another terminal of the first inductor and a first terminal of the second switch tube, and wherein a second terminal of the second switch tube and an anode of the second diode are both coupled to the negative electrode of the battery pack, wherein the first switch tube and the second switch tube are simultaneously turned on in response to that the battery pack is in a discharging state, or the first switch tube and the second switch tube are simultaneously turned off in response to that the battery pack is in a charging state.   
     
     
         2 . The battery control circuit according to  claim 1 , wherein the battery control circuit further comprises a control module coupled to a third terminal of the first switch tube and a third terminal of the second switch tube. 
     
     
         3 . The battery control circuit according to  claim 2 , wherein the battery control circuit further comprises a temperature detection module configured to: detect a temperature of the battery pack, and send the temperature of the battery pack to the control module; and
 wherein the control module is configured to: when the temperature of the battery pack is lower than a preset temperature, control the first switch tube and the second switch tube to simultaneously switch between an on state and an off state at a preset frequency.   
     
     
         4 . The battery control circuit according to  claim 3 , wherein the battery control circuit further comprises a current detection module configured to detect a current of the first inductor; and
 wherein the control module is configured to: obtain the current of the first inductor detected by the current detection module, and determine the preset frequency.   
     
     
         5 . The battery control circuit according to  claim 4 , wherein the preset frequency is determined by the control module based on a time interval between a first moment and a second moment, wherein the first moment is a moment at which the control module detects that the current of the first inductor increases to a first preset current, and wherein the second moment is a moment at which the control module detects that the current of the first inductor decreases to a second preset current. 
     
     
         6 . A battery control circuit comprising
 a first inductor, wherein the first inductor comprises a first winding and a second winding, and a first terminal of the first winding and a first terminal of the second winding are dotted terminals, and wherein the battery control circuit is connected in parallel between a positive electrode and a negative electrode of a battery pack;   a first switch tube, and   a second switch tube, wherein the first terminal of the first winding is coupled to the positive electrode of the battery pack, a second terminal of the first winding is coupled to a first terminal of the first switch tube, and a second terminal of the first switch tube is coupled to the negative electrode of the battery pack, and wherein a second terminal of the second winding is coupled to the positive electrode of the battery pack, wherein the first terminal of the second winding is coupled to a first terminal of the second switch tube, and wherein a second terminal of the second switch tube is coupled to the negative electrode of the battery pack, and wherein the first switch tube and the second switch tube are alternately turned on.   
     
     
         7 . The battery control circuit according to  claim 6 , wherein when the first switch tube is turned on and the second switch tube is turned off, the battery pack is in a discharging state; or
 when the second switch tube is turned on and the first switch tube is turned off, the battery pack is in a charging state.   
     
     
         8 . The battery control circuit according to  claim 6 , wherein when the first switch tube is turned on and the second switch tube is turned off, if a current direction of the first winding is a first direction, the battery pack is in a discharging state;
 when the second switch tube is turned on and the first switch tube is turned off, if a current direction of the second winding is a second direction, the battery pack is in a charging state;   when the second switch tube is turned on and the first switch tube is turned off, if a current direction of the second winding is a first direction, the battery pack is in a discharging state; or   when the first switch tube is turned on and the second switch tube is turned off, if a current direction of the first winding is a second direction, the battery pack is in a charging state, wherein the first direction is opposite to the second direction.   
     
     
         9 . The battery control circuit  claim 6 , wherein the battery control circuit further comprises a control module coupled to a third terminal of the first switch tube and a third terminal of the second switch tube. 
     
     
         10 . The battery control circuit according to  claim 9 , wherein the battery control circuit further comprises a temperature detection module configured to: detect a temperature of the battery pack, and send the temperature of the battery pack to the control module; and
 wherein the control module is configured to: when the temperature of the battery pack is lower than a preset temperature, control, at a preset frequency, the first switch tube and the second switch tube to be alternately turned on.   
     
     
         11 . The battery control circuit according to  claim 10 , wherein the battery control circuit further comprises a current detection module configured to detect a current of the first winding and a current of the second winding; and
 wherein the control module is configured to: obtain the current of the first winding and the current of the second winding that are detected by the current detection module, and determine the preset frequency.   
     
     
         12 . The battery control circuit according to  claim 11 , wherein the preset frequency is determined by the control module based on a time interval between a first moment and a second moment, wherein the first moment is a moment at which the control module detects that the current of the first winding increases to a first preset current, and wherein the second moment is a moment at which the control module detects that the current of the second winding decreases to a second preset current. 
     
     
         13 . A battery control circuit, comprising:
 a first inductor, wherein the first inductor comprises a first winding and a second winding, and wherein a first terminal of the first winding and a first terminal of the second winding are dotted terminals;   a first switch tube; and   a second switch tube, wherein the battery control circuit is applicable to a battery pack, wherein the battery pack comprises a first electrochemical cell and a second electrochemical cell, and wherein a positive electrode of the first electrochemical cell is coupled to a negative electrode of the second electrochemical cell;   wherein the first terminal of the first winding is coupled to a positive electrode of the second electrochemical cell, wherein a second terminal of the first winding is coupled to a first terminal of the first switch tube, and wherein a second terminal of the first switch tube is coupled to a negative electrode of the first electrochemical cell; and   wherein a second terminal of the second winding is coupled to the positive electrode of the first electrochemical cell, wherein the first terminal of the second winding is coupled to a first terminal of the second switch tube, wherein a second terminal of the second switch tube is coupled to the negative electrode of the first electrochemical cell, and wherein the first switch tube and the second switch tube are alternately turned on.   
     
     
         14 . The battery control circuit according to  claim 13 , wherein when the first switch tube is turned on and the second switch tube is turned off, the first electrochemical cell and the second electrochemical cell are in a discharging state; or
 when the second switch tube is turned on and the first switch tube is turned off, the first electrochemical cell is in a charging state.   
     
     
         15 . The battery control circuit according to  claim 13 , wherein when the first switch tube is turned on and the second switch tube is turned off, if a current direction of the first winding is a first direction, the first electrochemical cell and the second electrochemical cell are both in a discharging state;
 when the second switch tube is turned on and the first switch tube is turned off, if a current direction of the second winding is a second direction, the first electrochemical cell is in a charging state;   when the second switch tube is turned on and the first switch tube is turned off, if a current direction of the second winding is a first direction, the first electrochemical cell is in a discharging state; or   when the first switch tube is turned on and the second switch tube is turned off, if a current direction of the first winding is a second direction, the first electrochemical cell and the second electrochemical cell are in a charging state.   
     
     
         16 . The battery control circuit according to  claim 13 , wherein the battery control circuit further comprises a control module coupled to a third terminal of the first switch tube and a third terminal of the second switch tube. 
     
     
         17 . The battery control circuit according to  claim 16 , wherein the battery control circuit further comprises a temperature detection module configured to: detect temperatures of the first electrochemical cell and the second electrochemical cell, and send the temperatures of the first electrochemical cell and the second electrochemical cell to the control module; and
 wherein the control module is configured to: when the temperature of at least one of the first electrochemical cell and the second electrochemical cell is lower than a preset temperature, control, at a preset frequency, the first switch tube and the second switch tube to be alternately turned on.   
     
     
         18 . The battery control circuit according to  claim 17 , wherein the battery control circuit further comprises a current detection module configured to detect a current of the first winding and a current of the second winding; and
 wherein the control module is configured to: obtain the current of the first winding and the current of the second winding that are detected by the current detection module, and determine the preset frequency.   
     
     
         19 . The battery control circuit according to  claim 11 , wherein the preset frequency is determined by the control module based on a time interval between a first moment and a second moment, wherein the first moment is a moment at which the control module detects that the current of the first winding increases to a first preset current, and wherein the second moment is a moment at which the control module detects that the current of the second winding decreases to a second preset current.